[OpenFlash]

Originally Posted by Dmacc

What time is best to get there?

Starts at 11am

[R1000K3]

Originally Posted by BT#2

I've tried a 50/50 mix of e85 and 91 oct for a while and the car feels really great and snappy........

I really like that extra power @ higher rpm's which the e85 provides! .....

Interesting, I'll try the same with 95 octane and check what happens. You are still using meth?

Edit, according to some sources the effective octane is about 95 for e85. http://en.wikipedia.org/wiki/E85 This would yield like 93 octane in a 50/50 mix with 91 fuel. So meth is probably still needed on a FBO st 3 car at high boost. But I'm not sure, perhaps someone with deep insight in this area can chime in to.

[R1000K3]

Originally Posted by shiv@vishnu

Update:
Our 6at test car is now up and running on straight e85. Making good power. Will be giving rides in it tomorrow during our open house

How much?

[805beemer]

Sweet, cant wait to see some dynos/logs on 100% e85.

[OpenFlash]

Originally Posted by R1000K3

How much?

Same uncorrected power as straight race gas for now. But it's also a good 20f warmer today. But since we are at the limit of the stock turbos, there is only so much airflow potential. The real advantage of running e85 is its knock and heatsoak resistance. The downside is that you will guzzle 30% more fuel. We'll see how this plays out in the next few weeks.

[The Ghost]

Originally Posted by shiv@vishnu

Same uncorrected power as straight race gas for now. But it's also a good 20f warmer today. But since we are at the limit of the stock turbos, there is only so much airflow potential. The real advantage of running e85 is its knock and heatsoak resistance. The downside is that you will guzzle 30% more fuel. We'll see how this plays out in the next few weeks.

Are you running 100% stock fuel on this car?

[R1000K3]

Originally Posted by shiv@vishnu

Same uncorrected power as straight race gas for now. But it's also a good 20f warmer today. But since we are at the limit of the stock turbos, there is only so much airflow potential. The real advantage of running e85 is its knock and heatsoak resistance. The downside is that you will guzzle 30% more fuel. We'll see how this plays out in the next few weeks.

Is there any real need for meth then, when using 100% e85, from a safety perspective?

Another conclusion may be that stock turbos may work better since e85 burns at a lower Air to Fuel Ratio, i.e. it requires less boost but more fuel with e85. Is this a correct assumption? I guess I'm wrong here and the conclusion should be; 35% more fuel is needed for e85 for the same air supply as for gasoline at a given power level. But, e85 gives a power advantage by higher octane and cooling effect. Meth injection is still needed for higher power levels since it increases the amount of oxygen by cooling the intake air.

[BT#2]

Originally Posted by shiv@vishnu

Update:
Our 6at test car is now up and running on straight e85. Making good power. Will be giving rides in it tomorrow during our open house

That's really good to hear, let the e85 development start!

[BT#2]

Originally Posted by R1000K3

You are still using meth?

Yep, through a single CM10 Nozzle.
I have dual nozzles installed, but the logs looks really good with just the CM10 activated.
I'm planning to do some Vbox-runs on the next airfield event and see if there's any difference in performance by using dual nozzles (CM10 + CM7) vs a single CM10.

[R1000K3]

Originally Posted by BT#2

Yep, through a single CM10 Nozzle.
I have dual nozzles installed, but the logs looks really good with just the CM10 activated.
I'm planning to do some Vbox-runs on the next airfield event and see if there's any difference in performance by using dual nozzles (CM10 + CM7) vs a single CM10.

OK, I see.

I'll fill up the tank mostly with e85 next time and see how it effects the characteristics. I'm using a single CM10 as well.

[R1000K3]

It seems the octane rating differs a lot during the cold and warm season http://www.statoil.se/file_archive/0...Etanol_E85.pdf

[pits200]

Originally Posted by R1000K3

OK, I see.

I'll fill up the tank mostly with e85 next time and see how it effects the characteristics. I'm using a single CM10 as well.

I'm pretty sure Shiv has to be using another map with the 6at house car that is running 100% e85. Anytime I went over a 50/50 split, the car would toss codes(I forget what codes but it was fueling related).

So for him to be running 100% e85, a new fueling map has to be in the works I'd assume.

And if 30% more fueling is needed for e85, what about the maps where some of us are already at 34% of fueling already, how will the flow differential work?

[pits200]

And as for 30% more fuel, yes that'll make the mpg look ugly but on the flip side the average price of e85 nationwide is $3.32 and 93 is $4.15. That's a difference of 25% in gas price, so you're losing 5% of lets say on 20mpg, that means you're losing 1mpg with moderate throttle input. With a 16 gallon tank, you're essentially losing 16 miles per tank when it comes to cost.

[BT#2]

Here's a log through 3rd and 4th gear with a 50/50 mix of e85 and 93 oct + meth.
Looks pretty solid to me.

[enrita]

can you plot Fuel trims?

[BT#2]

Originally Posted by enrita

can you plot Fuel trims?

Unfortunately not as this is with my old BigTom-map...

[BT#2]

Originally Posted by shiv@vishnu

Update:
Our 6at test car is now up and running on straight e85. Making good power.

Any updates?

[The Ghost]

Originally Posted by BT#2

Here's a log through 3rd and 4th gear with a 50/50 mix of e85 and 93 oct + meth.
Looks pretty solid to me.

I'd like to see non-meth testing, as that would tell a truer story about the benefits of e85.

[OpenFlash]

Originally Posted by BT#2

Here's a log through 3rd and 4th gear with a 50/50 mix of e85 and 93 oct + meth.
Looks pretty solid to me.

Looks solid for sure. One interesting thing we found is that a 50/50 mix+ meth benefits from 2-3 deg more timing and nearly 1 point leaner AFR than straight pump+meth. We picked up nearly 20whp above 5000rpm once we made that change.

Shiv

[jpsimon]

just checked and there's no e85 in CT. looks like i won't be dabbling in this any time soon

[BT#2]

Originally Posted by shiv@vishnu

Looks solid for sure. One interesting thing we found is that a 50/50 mix+ meth benefits from 2-3 deg more timing and nearly 1 point leaner AFR than straight pump+meth. We picked up nearly 20whp above 5000rpm once we made that change.

Shiv

That sounds really interesting...
I'm going to an airfield event this weekend so I would really appreciate if you could make something interesting for me to try over there.

[DefactoM6]

Originally Posted by jpsimon

just checked and there's no e85 in CT. looks like i won't be dabbling in this any time soon

There is E85 right on the border, in Rye. Not terribly convenient, but could be fun for testing purposes.